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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004, 2005 Topspin Communications. All rights reserved. | |
2a1d9b7f RD |
3 | * Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved. |
4 | * Copyright (c) 2005 Mellanox Technologies. All rights reserved. | |
5 | * Copyright (c) 2004, 2005 Voltaire, Inc. All rights reserved. | |
1da177e4 LT |
6 | * |
7 | * This software is available to you under a choice of one of two | |
8 | * licenses. You may choose to be licensed under the terms of the GNU | |
9 | * General Public License (GPL) Version 2, available from the file | |
10 | * COPYING in the main directory of this source tree, or the | |
11 | * OpenIB.org BSD license below: | |
12 | * | |
13 | * Redistribution and use in source and binary forms, with or | |
14 | * without modification, are permitted provided that the following | |
15 | * conditions are met: | |
16 | * | |
17 | * - Redistributions of source code must retain the above | |
18 | * copyright notice, this list of conditions and the following | |
19 | * disclaimer. | |
20 | * | |
21 | * - Redistributions in binary form must reproduce the above | |
22 | * copyright notice, this list of conditions and the following | |
23 | * disclaimer in the documentation and/or other materials | |
24 | * provided with the distribution. | |
25 | * | |
26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
27 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
29 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
30 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
31 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
32 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
33 | * SOFTWARE. | |
34 | * | |
35 | * $Id: ipoib_ib.c 1386 2004-12-27 16:23:17Z roland $ | |
36 | */ | |
37 | ||
38 | #include <linux/delay.h> | |
39 | #include <linux/dma-mapping.h> | |
40 | ||
41 | #include <ib_cache.h> | |
42 | ||
43 | #include "ipoib.h" | |
44 | ||
45 | #ifdef CONFIG_INFINIBAND_IPOIB_DEBUG_DATA | |
46 | static int data_debug_level; | |
47 | ||
48 | module_param(data_debug_level, int, 0644); | |
49 | MODULE_PARM_DESC(data_debug_level, | |
50 | "Enable data path debug tracing if > 0"); | |
51 | #endif | |
52 | ||
53 | #define IPOIB_OP_RECV (1ul << 31) | |
54 | ||
55 | static DECLARE_MUTEX(pkey_sem); | |
56 | ||
57 | struct ipoib_ah *ipoib_create_ah(struct net_device *dev, | |
58 | struct ib_pd *pd, struct ib_ah_attr *attr) | |
59 | { | |
60 | struct ipoib_ah *ah; | |
61 | ||
62 | ah = kmalloc(sizeof *ah, GFP_KERNEL); | |
63 | if (!ah) | |
64 | return NULL; | |
65 | ||
66 | ah->dev = dev; | |
67 | ah->last_send = 0; | |
68 | kref_init(&ah->ref); | |
69 | ||
70 | ah->ah = ib_create_ah(pd, attr); | |
71 | if (IS_ERR(ah->ah)) { | |
72 | kfree(ah); | |
73 | ah = NULL; | |
74 | } else | |
75 | ipoib_dbg(netdev_priv(dev), "Created ah %p\n", ah->ah); | |
76 | ||
77 | return ah; | |
78 | } | |
79 | ||
80 | void ipoib_free_ah(struct kref *kref) | |
81 | { | |
82 | struct ipoib_ah *ah = container_of(kref, struct ipoib_ah, ref); | |
83 | struct ipoib_dev_priv *priv = netdev_priv(ah->dev); | |
84 | ||
85 | unsigned long flags; | |
86 | ||
2181858b | 87 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 LT |
88 | ipoib_dbg(priv, "Freeing ah %p\n", ah->ah); |
89 | ib_destroy_ah(ah->ah); | |
90 | kfree(ah); | |
91 | } else { | |
92 | spin_lock_irqsave(&priv->lock, flags); | |
93 | list_add_tail(&ah->list, &priv->dead_ahs); | |
94 | spin_unlock_irqrestore(&priv->lock, flags); | |
95 | } | |
96 | } | |
97 | ||
98 | static inline int ipoib_ib_receive(struct ipoib_dev_priv *priv, | |
99 | unsigned int wr_id, | |
100 | dma_addr_t addr) | |
101 | { | |
102 | struct ib_sge list = { | |
103 | .addr = addr, | |
104 | .length = IPOIB_BUF_SIZE, | |
105 | .lkey = priv->mr->lkey, | |
106 | }; | |
107 | struct ib_recv_wr param = { | |
108 | .wr_id = wr_id | IPOIB_OP_RECV, | |
109 | .sg_list = &list, | |
110 | .num_sge = 1, | |
111 | }; | |
112 | struct ib_recv_wr *bad_wr; | |
113 | ||
114 | return ib_post_recv(priv->qp, ¶m, &bad_wr); | |
115 | } | |
116 | ||
117 | static int ipoib_ib_post_receive(struct net_device *dev, int id) | |
118 | { | |
119 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
120 | struct sk_buff *skb; | |
121 | dma_addr_t addr; | |
122 | int ret; | |
123 | ||
124 | skb = dev_alloc_skb(IPOIB_BUF_SIZE + 4); | |
125 | if (!skb) { | |
126 | ipoib_warn(priv, "failed to allocate receive buffer\n"); | |
127 | ||
128 | priv->rx_ring[id].skb = NULL; | |
129 | return -ENOMEM; | |
130 | } | |
131 | skb_reserve(skb, 4); /* 16 byte align IP header */ | |
132 | priv->rx_ring[id].skb = skb; | |
133 | addr = dma_map_single(priv->ca->dma_device, | |
134 | skb->data, IPOIB_BUF_SIZE, | |
135 | DMA_FROM_DEVICE); | |
136 | pci_unmap_addr_set(&priv->rx_ring[id], mapping, addr); | |
137 | ||
138 | ret = ipoib_ib_receive(priv, id, addr); | |
139 | if (ret) { | |
140 | ipoib_warn(priv, "ipoib_ib_receive failed for buf %d (%d)\n", | |
141 | id, ret); | |
142 | dma_unmap_single(priv->ca->dma_device, addr, | |
143 | IPOIB_BUF_SIZE, DMA_FROM_DEVICE); | |
144 | dev_kfree_skb_any(skb); | |
145 | priv->rx_ring[id].skb = NULL; | |
146 | } | |
147 | ||
148 | return ret; | |
149 | } | |
150 | ||
151 | static int ipoib_ib_post_receives(struct net_device *dev) | |
152 | { | |
153 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
154 | int i; | |
155 | ||
156 | for (i = 0; i < IPOIB_RX_RING_SIZE; ++i) { | |
157 | if (ipoib_ib_post_receive(dev, i)) { | |
158 | ipoib_warn(priv, "ipoib_ib_post_receive failed for buf %d\n", i); | |
159 | return -EIO; | |
160 | } | |
161 | } | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | static void ipoib_ib_handle_wc(struct net_device *dev, | |
167 | struct ib_wc *wc) | |
168 | { | |
169 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
170 | unsigned int wr_id = wc->wr_id; | |
171 | ||
172 | ipoib_dbg_data(priv, "called: id %d, op %d, status: %d\n", | |
173 | wr_id, wc->opcode, wc->status); | |
174 | ||
175 | if (wr_id & IPOIB_OP_RECV) { | |
176 | wr_id &= ~IPOIB_OP_RECV; | |
177 | ||
178 | if (wr_id < IPOIB_RX_RING_SIZE) { | |
179 | struct sk_buff *skb = priv->rx_ring[wr_id].skb; | |
180 | ||
181 | priv->rx_ring[wr_id].skb = NULL; | |
182 | ||
183 | dma_unmap_single(priv->ca->dma_device, | |
184 | pci_unmap_addr(&priv->rx_ring[wr_id], | |
185 | mapping), | |
186 | IPOIB_BUF_SIZE, | |
187 | DMA_FROM_DEVICE); | |
188 | ||
189 | if (wc->status != IB_WC_SUCCESS) { | |
190 | if (wc->status != IB_WC_WR_FLUSH_ERR) | |
191 | ipoib_warn(priv, "failed recv event " | |
192 | "(status=%d, wrid=%d vend_err %x)\n", | |
193 | wc->status, wr_id, wc->vendor_err); | |
194 | dev_kfree_skb_any(skb); | |
195 | return; | |
196 | } | |
197 | ||
198 | ipoib_dbg_data(priv, "received %d bytes, SLID 0x%04x\n", | |
199 | wc->byte_len, wc->slid); | |
200 | ||
201 | skb_put(skb, wc->byte_len); | |
202 | skb_pull(skb, IB_GRH_BYTES); | |
203 | ||
204 | if (wc->slid != priv->local_lid || | |
205 | wc->src_qp != priv->qp->qp_num) { | |
206 | skb->protocol = ((struct ipoib_header *) skb->data)->proto; | |
62241eb4 | 207 | skb->mac.raw = skb->data; |
1da177e4 LT |
208 | skb_pull(skb, IPOIB_ENCAP_LEN); |
209 | ||
210 | dev->last_rx = jiffies; | |
211 | ++priv->stats.rx_packets; | |
212 | priv->stats.rx_bytes += skb->len; | |
213 | ||
214 | skb->dev = dev; | |
215 | /* XXX get correct PACKET_ type here */ | |
216 | skb->pkt_type = PACKET_HOST; | |
217 | netif_rx_ni(skb); | |
218 | } else { | |
219 | ipoib_dbg_data(priv, "dropping loopback packet\n"); | |
220 | dev_kfree_skb_any(skb); | |
221 | } | |
222 | ||
223 | /* repost receive */ | |
224 | if (ipoib_ib_post_receive(dev, wr_id)) | |
225 | ipoib_warn(priv, "ipoib_ib_post_receive failed " | |
226 | "for buf %d\n", wr_id); | |
227 | } else | |
228 | ipoib_warn(priv, "completion event with wrid %d\n", | |
229 | wr_id); | |
230 | ||
231 | } else { | |
232 | struct ipoib_buf *tx_req; | |
233 | unsigned long flags; | |
234 | ||
235 | if (wr_id >= IPOIB_TX_RING_SIZE) { | |
236 | ipoib_warn(priv, "completion event with wrid %d (> %d)\n", | |
237 | wr_id, IPOIB_TX_RING_SIZE); | |
238 | return; | |
239 | } | |
240 | ||
241 | ipoib_dbg_data(priv, "send complete, wrid %d\n", wr_id); | |
242 | ||
243 | tx_req = &priv->tx_ring[wr_id]; | |
244 | ||
245 | dma_unmap_single(priv->ca->dma_device, | |
246 | pci_unmap_addr(tx_req, mapping), | |
247 | tx_req->skb->len, | |
248 | DMA_TO_DEVICE); | |
249 | ||
250 | ++priv->stats.tx_packets; | |
251 | priv->stats.tx_bytes += tx_req->skb->len; | |
252 | ||
253 | dev_kfree_skb_any(tx_req->skb); | |
254 | ||
255 | spin_lock_irqsave(&priv->tx_lock, flags); | |
256 | ++priv->tx_tail; | |
257 | if (netif_queue_stopped(dev) && | |
258 | priv->tx_head - priv->tx_tail <= IPOIB_TX_RING_SIZE / 2) | |
259 | netif_wake_queue(dev); | |
260 | spin_unlock_irqrestore(&priv->tx_lock, flags); | |
261 | ||
262 | if (wc->status != IB_WC_SUCCESS && | |
263 | wc->status != IB_WC_WR_FLUSH_ERR) | |
264 | ipoib_warn(priv, "failed send event " | |
265 | "(status=%d, wrid=%d vend_err %x)\n", | |
266 | wc->status, wr_id, wc->vendor_err); | |
267 | } | |
268 | } | |
269 | ||
270 | void ipoib_ib_completion(struct ib_cq *cq, void *dev_ptr) | |
271 | { | |
272 | struct net_device *dev = (struct net_device *) dev_ptr; | |
273 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
274 | int n, i; | |
275 | ||
276 | ib_req_notify_cq(cq, IB_CQ_NEXT_COMP); | |
277 | do { | |
278 | n = ib_poll_cq(cq, IPOIB_NUM_WC, priv->ibwc); | |
279 | for (i = 0; i < n; ++i) | |
280 | ipoib_ib_handle_wc(dev, priv->ibwc + i); | |
281 | } while (n == IPOIB_NUM_WC); | |
282 | } | |
283 | ||
284 | static inline int post_send(struct ipoib_dev_priv *priv, | |
285 | unsigned int wr_id, | |
286 | struct ib_ah *address, u32 qpn, | |
287 | dma_addr_t addr, int len) | |
288 | { | |
289 | struct ib_send_wr *bad_wr; | |
290 | ||
291 | priv->tx_sge.addr = addr; | |
292 | priv->tx_sge.length = len; | |
293 | ||
294 | priv->tx_wr.wr_id = wr_id; | |
295 | priv->tx_wr.wr.ud.remote_qpn = qpn; | |
296 | priv->tx_wr.wr.ud.ah = address; | |
297 | ||
298 | return ib_post_send(priv->qp, &priv->tx_wr, &bad_wr); | |
299 | } | |
300 | ||
301 | void ipoib_send(struct net_device *dev, struct sk_buff *skb, | |
302 | struct ipoib_ah *address, u32 qpn) | |
303 | { | |
304 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
305 | struct ipoib_buf *tx_req; | |
306 | dma_addr_t addr; | |
307 | ||
308 | if (skb->len > dev->mtu + INFINIBAND_ALEN) { | |
309 | ipoib_warn(priv, "packet len %d (> %d) too long to send, dropping\n", | |
310 | skb->len, dev->mtu + INFINIBAND_ALEN); | |
311 | ++priv->stats.tx_dropped; | |
312 | ++priv->stats.tx_errors; | |
313 | dev_kfree_skb_any(skb); | |
314 | return; | |
315 | } | |
316 | ||
317 | ipoib_dbg_data(priv, "sending packet, length=%d address=%p qpn=0x%06x\n", | |
318 | skb->len, address, qpn); | |
319 | ||
320 | /* | |
321 | * We put the skb into the tx_ring _before_ we call post_send() | |
322 | * because it's entirely possible that the completion handler will | |
323 | * run before we execute anything after the post_send(). That | |
324 | * means we have to make sure everything is properly recorded and | |
325 | * our state is consistent before we call post_send(). | |
326 | */ | |
327 | tx_req = &priv->tx_ring[priv->tx_head & (IPOIB_TX_RING_SIZE - 1)]; | |
328 | tx_req->skb = skb; | |
329 | addr = dma_map_single(priv->ca->dma_device, skb->data, skb->len, | |
330 | DMA_TO_DEVICE); | |
331 | pci_unmap_addr_set(tx_req, mapping, addr); | |
332 | ||
333 | if (unlikely(post_send(priv, priv->tx_head & (IPOIB_TX_RING_SIZE - 1), | |
334 | address->ah, qpn, addr, skb->len))) { | |
335 | ipoib_warn(priv, "post_send failed\n"); | |
336 | ++priv->stats.tx_errors; | |
337 | dma_unmap_single(priv->ca->dma_device, addr, skb->len, | |
338 | DMA_TO_DEVICE); | |
339 | dev_kfree_skb_any(skb); | |
340 | } else { | |
341 | dev->trans_start = jiffies; | |
342 | ||
343 | address->last_send = priv->tx_head; | |
344 | ++priv->tx_head; | |
345 | ||
346 | if (priv->tx_head - priv->tx_tail == IPOIB_TX_RING_SIZE) { | |
347 | ipoib_dbg(priv, "TX ring full, stopping kernel net queue\n"); | |
348 | netif_stop_queue(dev); | |
349 | } | |
350 | } | |
351 | } | |
352 | ||
353 | static void __ipoib_reap_ah(struct net_device *dev) | |
354 | { | |
355 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
356 | struct ipoib_ah *ah, *tah; | |
357 | LIST_HEAD(remove_list); | |
358 | ||
359 | spin_lock_irq(&priv->lock); | |
360 | list_for_each_entry_safe(ah, tah, &priv->dead_ahs, list) | |
2181858b | 361 | if ((int) priv->tx_tail - (int) ah->last_send >= 0) { |
1da177e4 LT |
362 | list_del(&ah->list); |
363 | list_add_tail(&ah->list, &remove_list); | |
364 | } | |
365 | spin_unlock_irq(&priv->lock); | |
366 | ||
367 | list_for_each_entry_safe(ah, tah, &remove_list, list) { | |
368 | ipoib_dbg(priv, "Reaping ah %p\n", ah->ah); | |
369 | ib_destroy_ah(ah->ah); | |
370 | kfree(ah); | |
371 | } | |
372 | } | |
373 | ||
374 | void ipoib_reap_ah(void *dev_ptr) | |
375 | { | |
376 | struct net_device *dev = dev_ptr; | |
377 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
378 | ||
379 | __ipoib_reap_ah(dev); | |
380 | ||
381 | if (!test_bit(IPOIB_STOP_REAPER, &priv->flags)) | |
382 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); | |
383 | } | |
384 | ||
385 | int ipoib_ib_dev_open(struct net_device *dev) | |
386 | { | |
387 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
388 | int ret; | |
389 | ||
390 | ret = ipoib_qp_create(dev); | |
391 | if (ret) { | |
392 | ipoib_warn(priv, "ipoib_qp_create returned %d\n", ret); | |
393 | return -1; | |
394 | } | |
395 | ||
396 | ret = ipoib_ib_post_receives(dev); | |
397 | if (ret) { | |
398 | ipoib_warn(priv, "ipoib_ib_post_receives returned %d\n", ret); | |
399 | return -1; | |
400 | } | |
401 | ||
402 | clear_bit(IPOIB_STOP_REAPER, &priv->flags); | |
403 | queue_delayed_work(ipoib_workqueue, &priv->ah_reap_task, HZ); | |
404 | ||
405 | return 0; | |
406 | } | |
407 | ||
408 | int ipoib_ib_dev_up(struct net_device *dev) | |
409 | { | |
410 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
411 | ||
412 | set_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
413 | ||
414 | return ipoib_mcast_start_thread(dev); | |
415 | } | |
416 | ||
417 | int ipoib_ib_dev_down(struct net_device *dev) | |
418 | { | |
419 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
420 | ||
421 | ipoib_dbg(priv, "downing ib_dev\n"); | |
422 | ||
423 | clear_bit(IPOIB_FLAG_OPER_UP, &priv->flags); | |
424 | netif_carrier_off(dev); | |
425 | ||
426 | /* Shutdown the P_Key thread if still active */ | |
427 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
428 | down(&pkey_sem); | |
429 | set_bit(IPOIB_PKEY_STOP, &priv->flags); | |
430 | cancel_delayed_work(&priv->pkey_task); | |
431 | up(&pkey_sem); | |
432 | flush_workqueue(ipoib_workqueue); | |
433 | } | |
434 | ||
435 | ipoib_mcast_stop_thread(dev); | |
436 | ||
437 | /* | |
438 | * Flush the multicast groups first so we stop any multicast joins. The | |
439 | * completion thread may have already died and we may deadlock waiting | |
440 | * for the completion thread to finish some multicast joins. | |
441 | */ | |
442 | ipoib_mcast_dev_flush(dev); | |
443 | ||
444 | /* Delete broadcast and local addresses since they will be recreated */ | |
445 | ipoib_mcast_dev_down(dev); | |
446 | ||
447 | ipoib_flush_paths(dev); | |
448 | ||
449 | return 0; | |
450 | } | |
451 | ||
452 | static int recvs_pending(struct net_device *dev) | |
453 | { | |
454 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
455 | int pending = 0; | |
456 | int i; | |
457 | ||
458 | for (i = 0; i < IPOIB_RX_RING_SIZE; ++i) | |
459 | if (priv->rx_ring[i].skb) | |
460 | ++pending; | |
461 | ||
462 | return pending; | |
463 | } | |
464 | ||
465 | int ipoib_ib_dev_stop(struct net_device *dev) | |
466 | { | |
467 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
468 | struct ib_qp_attr qp_attr; | |
469 | int attr_mask; | |
470 | unsigned long begin; | |
471 | struct ipoib_buf *tx_req; | |
472 | int i; | |
473 | ||
474 | /* Kill the existing QP and allocate a new one */ | |
475 | qp_attr.qp_state = IB_QPS_ERR; | |
476 | attr_mask = IB_QP_STATE; | |
477 | if (ib_modify_qp(priv->qp, &qp_attr, attr_mask)) | |
478 | ipoib_warn(priv, "Failed to modify QP to ERROR state\n"); | |
479 | ||
480 | /* Wait for all sends and receives to complete */ | |
481 | begin = jiffies; | |
482 | ||
483 | while (priv->tx_head != priv->tx_tail || recvs_pending(dev)) { | |
484 | if (time_after(jiffies, begin + 5 * HZ)) { | |
485 | ipoib_warn(priv, "timing out; %d sends %d receives not completed\n", | |
486 | priv->tx_head - priv->tx_tail, recvs_pending(dev)); | |
487 | ||
488 | /* | |
489 | * assume the HW is wedged and just free up | |
490 | * all our pending work requests. | |
491 | */ | |
2181858b | 492 | while ((int) priv->tx_tail - (int) priv->tx_head < 0) { |
1da177e4 LT |
493 | tx_req = &priv->tx_ring[priv->tx_tail & |
494 | (IPOIB_TX_RING_SIZE - 1)]; | |
495 | dma_unmap_single(priv->ca->dma_device, | |
496 | pci_unmap_addr(tx_req, mapping), | |
497 | tx_req->skb->len, | |
498 | DMA_TO_DEVICE); | |
499 | dev_kfree_skb_any(tx_req->skb); | |
500 | ++priv->tx_tail; | |
501 | } | |
502 | ||
503 | for (i = 0; i < IPOIB_RX_RING_SIZE; ++i) | |
504 | if (priv->rx_ring[i].skb) { | |
505 | dma_unmap_single(priv->ca->dma_device, | |
506 | pci_unmap_addr(&priv->rx_ring[i], | |
507 | mapping), | |
508 | IPOIB_BUF_SIZE, | |
509 | DMA_FROM_DEVICE); | |
510 | dev_kfree_skb_any(priv->rx_ring[i].skb); | |
511 | priv->rx_ring[i].skb = NULL; | |
512 | } | |
513 | ||
514 | goto timeout; | |
515 | } | |
516 | ||
517 | msleep(1); | |
518 | } | |
519 | ||
520 | ipoib_dbg(priv, "All sends and receives done.\n"); | |
521 | ||
522 | timeout: | |
523 | qp_attr.qp_state = IB_QPS_RESET; | |
524 | attr_mask = IB_QP_STATE; | |
525 | if (ib_modify_qp(priv->qp, &qp_attr, attr_mask)) | |
526 | ipoib_warn(priv, "Failed to modify QP to RESET state\n"); | |
527 | ||
528 | /* Wait for all AHs to be reaped */ | |
529 | set_bit(IPOIB_STOP_REAPER, &priv->flags); | |
530 | cancel_delayed_work(&priv->ah_reap_task); | |
531 | flush_workqueue(ipoib_workqueue); | |
532 | ||
533 | begin = jiffies; | |
534 | ||
535 | while (!list_empty(&priv->dead_ahs)) { | |
536 | __ipoib_reap_ah(dev); | |
537 | ||
538 | if (time_after(jiffies, begin + HZ)) { | |
539 | ipoib_warn(priv, "timing out; will leak address handles\n"); | |
540 | break; | |
541 | } | |
542 | ||
543 | msleep(1); | |
544 | } | |
545 | ||
546 | return 0; | |
547 | } | |
548 | ||
549 | int ipoib_ib_dev_init(struct net_device *dev, struct ib_device *ca, int port) | |
550 | { | |
551 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
552 | ||
553 | priv->ca = ca; | |
554 | priv->port = port; | |
555 | priv->qp = NULL; | |
556 | ||
557 | if (ipoib_transport_dev_init(dev, ca)) { | |
558 | printk(KERN_WARNING "%s: ipoib_transport_dev_init failed\n", ca->name); | |
559 | return -ENODEV; | |
560 | } | |
561 | ||
562 | if (dev->flags & IFF_UP) { | |
563 | if (ipoib_ib_dev_open(dev)) { | |
564 | ipoib_transport_dev_cleanup(dev); | |
565 | return -ENODEV; | |
566 | } | |
567 | } | |
568 | ||
569 | return 0; | |
570 | } | |
571 | ||
572 | void ipoib_ib_dev_flush(void *_dev) | |
573 | { | |
574 | struct net_device *dev = (struct net_device *)_dev; | |
575 | struct ipoib_dev_priv *priv = netdev_priv(dev), *cpriv; | |
576 | ||
577 | if (!test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
578 | return; | |
579 | ||
580 | ipoib_dbg(priv, "flushing\n"); | |
581 | ||
582 | ipoib_ib_dev_down(dev); | |
583 | ||
584 | /* | |
585 | * The device could have been brought down between the start and when | |
586 | * we get here, don't bring it back up if it's not configured up | |
587 | */ | |
588 | if (test_bit(IPOIB_FLAG_ADMIN_UP, &priv->flags)) | |
589 | ipoib_ib_dev_up(dev); | |
590 | ||
591 | /* Flush any child interfaces too */ | |
592 | list_for_each_entry(cpriv, &priv->child_intfs, list) | |
593 | ipoib_ib_dev_flush(&cpriv->dev); | |
594 | } | |
595 | ||
596 | void ipoib_ib_dev_cleanup(struct net_device *dev) | |
597 | { | |
598 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
599 | ||
600 | ipoib_dbg(priv, "cleaning up ib_dev\n"); | |
601 | ||
602 | ipoib_mcast_stop_thread(dev); | |
603 | ||
604 | /* Delete the broadcast address and the local address */ | |
605 | ipoib_mcast_dev_down(dev); | |
606 | ||
607 | ipoib_transport_dev_cleanup(dev); | |
608 | } | |
609 | ||
610 | /* | |
611 | * Delayed P_Key Assigment Interim Support | |
612 | * | |
613 | * The following is initial implementation of delayed P_Key assigment | |
614 | * mechanism. It is using the same approach implemented for the multicast | |
615 | * group join. The single goal of this implementation is to quickly address | |
616 | * Bug #2507. This implementation will probably be removed when the P_Key | |
617 | * change async notification is available. | |
618 | */ | |
619 | int ipoib_open(struct net_device *dev); | |
620 | ||
621 | static void ipoib_pkey_dev_check_presence(struct net_device *dev) | |
622 | { | |
623 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
624 | u16 pkey_index = 0; | |
625 | ||
626 | if (ib_find_cached_pkey(priv->ca, priv->port, priv->pkey, &pkey_index)) | |
627 | clear_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
628 | else | |
629 | set_bit(IPOIB_PKEY_ASSIGNED, &priv->flags); | |
630 | } | |
631 | ||
632 | void ipoib_pkey_poll(void *dev_ptr) | |
633 | { | |
634 | struct net_device *dev = dev_ptr; | |
635 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
636 | ||
637 | ipoib_pkey_dev_check_presence(dev); | |
638 | ||
639 | if (test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) | |
640 | ipoib_open(dev); | |
641 | else { | |
642 | down(&pkey_sem); | |
643 | if (!test_bit(IPOIB_PKEY_STOP, &priv->flags)) | |
644 | queue_delayed_work(ipoib_workqueue, | |
645 | &priv->pkey_task, | |
646 | HZ); | |
647 | up(&pkey_sem); | |
648 | } | |
649 | } | |
650 | ||
651 | int ipoib_pkey_dev_delay_open(struct net_device *dev) | |
652 | { | |
653 | struct ipoib_dev_priv *priv = netdev_priv(dev); | |
654 | ||
655 | /* Look for the interface pkey value in the IB Port P_Key table and */ | |
656 | /* set the interface pkey assigment flag */ | |
657 | ipoib_pkey_dev_check_presence(dev); | |
658 | ||
659 | /* P_Key value not assigned yet - start polling */ | |
660 | if (!test_bit(IPOIB_PKEY_ASSIGNED, &priv->flags)) { | |
661 | down(&pkey_sem); | |
662 | clear_bit(IPOIB_PKEY_STOP, &priv->flags); | |
663 | queue_delayed_work(ipoib_workqueue, | |
664 | &priv->pkey_task, | |
665 | HZ); | |
666 | up(&pkey_sem); | |
667 | return 1; | |
668 | } | |
669 | ||
670 | return 0; | |
671 | } |